What is the air quality trend in Iwase?

Over the past 20 days, Iwase had an average AQI of 38 based on station measurements. The worst day was 2026-05-18 with AQI 52.

How is Iwase air quality measured?

Air quality in Iwase is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Iwase, Japan

Name: Iwase Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Iwase, Japan.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

475h

PM2.5 Station

475h · 15 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	43	25–165	12.1 µg/m³	24h	14
2026-05-28	32	21–52	7.7 µg/m³	24h	13
2026-05-27	28	20–38	6.7 µg/m³	24h	14
2026-05-26	32	22–45	7.8 µg/m³	24h	14
2026-05-25	34	25–45	8.3 µg/m³	24h	14
2026-05-24	36	24–51	8.5 µg/m³	24h	14
2026-05-23	34	21–43	8.1 µg/m³	24h	15
2026-05-22	31	21–42	7.5 µg/m³	24h	15
2026-05-21	32	23–46	7.6 µg/m³	24h	13
2026-05-20	35	24–53	8.4 µg/m³	24h	14
2026-05-19	39	29–55	9.3 µg/m³	24h	15
2026-05-18	52	40–63	13.0 µg/m³	24h	15
2026-05-17	44	10–58	10.7 µg/m³	24h	14
2026-05-16	50	38–59	12.4 µg/m³	21h	14
2026-05-15	48	29–57	11.7 µg/m³	24h	13
2026-05-14	46	34–55	11.0 µg/m³	24h	13
2026-05-13	37	29–51	8.9 µg/m³	24h	14
2026-05-12	33	24–72	8.1 µg/m³	24h	14
2026-05-11	39	27–59	9.6 µg/m³	24h	13
2026-05-10	38	28–45	9.1 µg/m³	22h	14

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